endGlide method
Ends a glide started with glideTo, typically when the finger lifts.
Activates the highlighted item exactly as a tap would (runs it and
closes, or opens its GlassMenuItem.submenu) and returns true. With
nothing highlighted, it clears the glide, leaves the menu open, and
returns false.
Implementation
bool endGlide() => _state?._endGlide() ?? false;